I have a USB HID Device STM32CubeIDE project with the following USB HID Report Descriptor
0x05,0x01, // Usage Page: Generic Desktop Page (0x01), page HID Usage Tables 1.4
0x09,0x06, // Usage: Keyboard (0x06)
0xa1,0x01, // Collection: Application
0x05,0x07, // Usage Page: Keyboard/Keypad Page (0x07)
0x19,0xe0, // Usage Minimum: 0xe0: kbd lctrl
0x29,0xe7, // Usage Maximum: 0xe7: kbd rgui
0x15,0x00, // Logical Minimum: 0
0x25,0x01, // Logical Maximum: 1
0x95,0x08, // Report Count: 8 // 8 keys? mod mask
0x75,0x01, // Report Size: 1 // 1 bit each?
0x81,0x02, // Input: Data,Var, Abs,No Wrap,Linear,Preferred State,No Null Position
0x95,0x01, // Report Count: 1 // 1 key? pad
0x75,0x08, // Report Size: 8 // 8 bits each?
0x81,0x03, // Input: Const,Var, Abs,No Wrap,Linear,Preferred State,No Null Position
0x05,0x07, // Usage Page: Kbrd/Keypad
0x19,0x00, // Usage Minimum
0x29,0xff, // Usage Maximum // 0x65 is the max for a boot device?
0x15,0x00, // Logical Minimum
0x26,0xff,0x00, // Logical Maximum // 0x65 is the max for a boot device? // 0x25: int8? 0x26: int16?
0x95,0x06, // Report Count: 6 // 6 keys? 6 keys (6KRO)
0x75,0x08, // Report Size: 8 // 8 bits each?
0x81,0x00, // Input: Data,Array, Abs,No Wrap,Linear,Preferred State,No Null Position
0xc0, // End Collection
and I can send (say) an "a" key press/release with the following USB HID Report:
uint8_t hid_report[0x08] = {0x00};
hid_report[0x00] = 0b0000000;
hid_report[0x02] = 0x04;
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&hid_report,sizeof(hid_report));
HAL_Delay(50);
hid_report[0x00] = 0b0000000;
hid_report[0x02] = 0x00;
USBD_HID_SendReport(&hUsbDeviceFS, (uint8_t*)&hid_report,sizeof(hid_report));
HAL_Delay(1000);
Now the USB HID Usage Tables 1.4 document has a Usage Page dedicated to Unicode (Usage Page 0x10) that says that one can send Unicode encoded as UCS-2. But it's unclear to me how the HID Report should look like in that case.
So, how exactly does the HID Report look like (for one, or several) Unicode characters?
